Merge "Fail fingerprint enroll with error if HAT is null" into sc-dev

import android.app.Activity;

import android.app.settings.SettingsEnums;

import android.hardware.fingerprint.FingerprintManager;

import android.util.Log;

import com.android.settings.R;

import com.android.settings.Utils;

import com.android.settings.biometrics.BiometricEnrollSidecar;

 * Sidecar fragment to handle the state around fingerprint enrollment.

 */

public class FingerprintEnrollSidecar extends BiometricEnrollSidecar {

    private static final String TAG = "FingerprintEnrollSidecar";

    private FingerprintManager mFingerprintManager;

    private @FingerprintManager.EnrollReason int mEnrollReason;

    @Override

    protected void startEnrollment() {

        super.startEnrollment();

        if (mToken == null) {

            Log.e(TAG, "Null hardware auth token for enroll");

            onEnrollmentError(FingerprintManager.FINGERPRINT_ERROR_HW_UNAVAILABLE,

                    getString(R.string.fingerprint_intro_error_unknown));

            return;

        }

        mFingerprintManager.enroll(mToken, mEnrollmentCancel, mUserId, mEnrollmentCallback,

                mEnrollReason);

    }